Shear wave splitting in the Isparta Angle, southwestern Turkey: Anisotropic complexity in the mantle

Journal of Earth system science

Aslihan ÅžapaÅŸ1¹  Aysun Boztepe-Gddot{u}ney1¹ 

[1] Department of Geophysical Engineering, Faculty of Mines, dot{I}stanbul Technical University of dot{I}stanbul 34390, Maslak, Turkey.$$

关键词: Shear wave splitting;    polarization direction;    mantle polarization anisotropy;    SKS and SKKS phases;    Isparta Angle.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

This study presents shear wave splitting analysis results observed at ISP (Isparta)broadband station in the Isparta Angle,southwestern Turkey.We selected 21 good quality seismic events out of nearly 357 earthquakes and calculated splitting parameters (polarization direction of fast wave, 𝜙 and delay time between fast and slow waves, 𝛿 𝑡) from mainly SKS and a few SKKS phases of the selected 21 seismic events. Then, we compared calculated splitting parameters at ISP station (56° ≤ 𝜙 ≤ 205° ; 0.37s ≤ 𝛿 t ≤ 4s) with those previously calculated at ANTO (Ankara) and ISK (˙Istanbul)stations (27° ≤ 𝜙 ≤ 59°; 0.6s ≤ 𝛿 t ≤ 2.4s and 26° ≤ 𝜙 ≤ 54° ;0.6s ≤ 𝛿 t ≤ 1.5s) which are located at 230 and 379 km away from ISP station in central and northwestern Turkey, respectively.The backazimuthal variations of the splitting parameters at ISP station indicate a different and complex mantle polarization anisotropy for the Isparta Angle in southwestern Turkey compared to those obtained for Ankara and Īstanbul stations.

【 授权许可】

Unknown